Regex Tester
Test and debug regular expressions with real-time matching and highlighting
Regex Tester Help
Build, test, and debug regular expressions easily. This tool supports syntax highlighting, match previews, and real-time validation for developers working with complex regex patterns.
How to Use
- Enter your regex pattern in the first field
- Enter or paste the text you want to test against
- Optionally enable case-sensitive matching
- Click "Test Regex" to see matches
Common Regex Patterns
^[A-Za-z0-9]+$ - Alphanumeric characters only
\d{3}-\d{3}-\d{4} - Phone number (123-456-7890)
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ - Email address
^https?:// - URL starting with http:// or https://
\b[A-Z][a-z]+\b - Capitalized words
Understanding Results
- Matches Found: Number of times your pattern matched in the text
- Total Characters: Total length of your test text
- Matched Chars: Total characters that matched your pattern
- Match %: Percentage of text that matched
💡 Tip
Use the highlighted output to see exactly where your pattern matches in the text. Matches are highlighted in yellow.
Usage Limits
| Plan | Daily Limit | Best For |
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